Preparation and characterization of organofunctional sol-gel materials and their application in toxic metal separation.

摘要

Inorganic-organic hybrid SiO₂ sol-gels anchored with organic ligands have been studied as new sorbents for heavy metal (e.g., Cu 2+, Hg2+, Cd2+, Zn2+, and Ni2+) separation.; A novel sol-gel precursor (RO)₃Si∼∼L (L: thioacetal) was designed, and its reaction with Hg(II) has been evaluated in ligand-grafted sol-gels. Studies using molecular models of the grafted thioacetals were also conducted.